1. Overview & Features:

️· Type: Three-terminal adjustable regulator.
️· Key Benefit: Designed for improved thermal performance and reliability.
️· Internal Protection: Includes power and thermal limiting circuitry to prevent damage under overload conditions.
️· Advanced Thermal Specs: Provides separate thermal resistance specifications for the Control Section and Power Transistor, allowing for more precise thermal management.

2. Application Hints & Considerations

️· Load Regulation:
- Best load regulation is achieved when the positive lead between the regulator and the load is as short as possible.
- Use large wire/PC traces for load connections.
- Connect R1 (in the output voltage divider) to the regulator's case, not directly to the load.
️· Thermal Management:
- Thermal compound is recommended between the case and heat sink.
- Consider thermally conductive spacers if electrical isolation is needed.
- Provides separate thermal resistance specs for the Control Section and Power Transistor.
️· Overload Recovery:
- May require power cycling if a heavy output load and low output voltage leads to a double intersection on the output current curve.
️· Ripple Rejection:
- Proper bypassing for ripple rejection requires an adjust pin capacitor whose impedance is less than R1 (typically 100-120 ohms).
️· Input Protection:
- Internal resistors limit current paths on the adjustment pin, removing the need for external protection diodes under normal operation.
- A diode from output to input is recommended when a crowbar circuit exists at the input of the regulator.
️· Maximum Input-to-Output Voltage Differential: Avoid exceeding the maximum allowed differential; otherwise, protection circuitry will be bypassed and the transistors could break down.

3. Output Voltage Calculation:

️· The output voltage is calculated using the following formula:
- `V OUT = V REF ( 1+ R2/R1)+I ADJ R2`
- Where:
■ `V REF` is the reference voltage (1.25V)
■ `R1` and `R2` are the resistor values in the output divider
■ `I ADJ` is the adjust pin current (small and usually ignored).

4. Typical Performance Characteristics (Mentioned, but No Specific Data Provided):

️· Temperature Stability
️· Load Regulation
️· Dropout Voltage
️· Ripple Rejection

5. Key Warnings & Notes:

️· Crowbar Circuits: Be cautious of using large output capacitors when a crowbar circuit is used at the input.
️· Thermal Limits: Pay close attention to thermal limits to prevent damage to the regulator.